Pneumatic vehicle tire



H. S. BLYNT.

PNEUMATIC VEHICLE TIRE.

APPLICATION FILED JAN. !5. 1921.

1 ,438,015. Patented D o. 5,1922.

Patented Der: 5, 1922..

emt?? M HERBEET S. BLY1\TT, or YALE, oKLnsIoMA.`

PNEUMATC VEHIGLE TIEE.

Application filed January 15, 1921. Serial Ne. 437554.

' To all 'whom it may concem:

Be 'it known that I, Hnnnaur S. BLYNT, a

' citizen of the United States of America, re-

-This invention relates to certain new` and y useful improvenients in' pneumatic vehicle tires and the primary 'obj ect of the invention is to provide a device for insertion, within the ordinary tre shoe whch may, of itself, act as an improved inner tube tor, which may serve as a tube receiver and protector in .such manner as to eliminate many of the great difliculties and troubles had with` tires and tubes as they are'used at present.

As at present used, the inner tube, under pressure, is not round in cross section,'but is r forced out of shape by being eXpanded or rolled on mandrels.

stretched laterally and inwardly to fit the difierently shaped space within the tre shoe and thereby fill a vacancy at the inner part of `said shoe. When a -tire is on the rini, there is a somewhat wedge-shaped space between the tube and the shoe' into which a fiap is generally inserted to prevent the tube from coming in contact with the adjacent part of the metal rim. The flap above mentioned` is seldom used after the garage man once changes thetube. As a result of this thousands of tires are ruined by allowing the tube'to come in contact with the metal portion ot the rim, said rim being repeatedly heated in warm weather particularly, or by fast driving, and the friction, produced by the expansion and contraction` of the tube causes it to burst andtear.

-The space at the inner part otthe tire shoe is filled by a portion of the device 'constituting the present invention andj I thereby provide a perfectly round space in cross section so that when a tube is used inside' of the protector, such tube will not be strained or stretched out of shape.

Another advantage of the nvention is that the present tube or tube receiver and protector can be made quicker than the ordinary tube. In making the ordinary tube, the materials to be used are first calendered into sheets, cut into proper widths and These sheets are then wrapped with cloth under pressureby a 5 special machine and vulcanized or cured.

`When they are cured, they i are taken out i andthe 'tube is removed fromthe mandrel by forcing air under pressure between; the tube and the mandrel. pulled oli, and in doing soythe tube is forced inside out and' is thereby considerably: i

Next,` the tubes are: cut into y i strained.

The tube is thena 260 lengths and the ends of the same are ground' p down orslrived. They are then treated to a bath of acid and joined togetherand then' revulcanized `after; which 'the pad for the:

valve is` applied. The tubes practically gothrough this same process and the valve is inserted. The present invention does* away' W with this when the usual tube is not' em-' pl'oyed, as the present' inventionrniay 'be manufactured in one operation.` words, the invention is formed of the `:inaterial or goods after thelatter leave the rubber mill and they are cut into one strip, put on a core, and placed into the mold. They In other a are then cured and come out finished in onez. i

operation of a few 'simple successive steps.

'Another great advantage in the present ine' vention is that repairs can be done thereon outside. 'All that -is required to repair the present invention is to. open it,` and in case of a rentor'tear, it can be repaired witha' fabric or rubberpatch while only a rubber. patch can be used on the usual tube. 4

With the above general objects in .View

by access to the inside of the same, while the usual tubes have to be repaired fromthe and others that will become apparent as the nature of the invention is better understood, the same consists n the novel form, combination and arrangement of parts herein i after more tully described in connection with the accompanying'drawings and in which like reference characters designate corrsponding partst throughout the several views,

In the drawings,- v e Figure 1 is a theoretical cross sectional View of a tire equipped with the present invention'before infiation, and

Figure 2 is a similar View after inflation. The protector of the present invention is made in what isknown ass a tull mold and comprses a hollow annulus split circumterentially at its inner' side as indicated at 5, so that the annulus is' not air tight or practi-- cally anair container until after it is inflated as will presently become apparent,

This protectoris indicated broadly by the numeral 6 and is made of suitable somewhat elastio material molded to the shape of Figure 1 wherein the inner portion of the same and of wedge-shape, said wedge-shaped inner portion being Wder than the space at -the inner portion of the tire Shoe With which the tube is to be used Whereby the meeting edges of the tube at the split of the inner portion of the latter are forced together when the tube is inflated, said tube being elastic and flexible and molded to have its entire tread portion normally assume an inwardly depressed condition so as to lie in spaced relation to the inner face of the tread portion of the tire shoe, and With the side and inner portions of the tube slightly spaced from the adjacent portions of the usual tire rim and tire Shoe.

4. As an article of manufacture, an endless inner tube for pnenmatc tires circumferentially split at its inner portion, 'the inner portion of the tube' being relatively thicker than the remaining portion thereof and of Wedge-shape, said inner portion of the tube being also ;of normally greater Width than the space between the beads of the shoe in which the tube is tobe used and l v being. formed adjacent said split of compressible material Whereby; the meeting edges of the tube at the innei` portion of the latter are forced together When the tube is inflated .forproviding an air-tightjoint at said split. 7

In testim'ony Whereof I afx my signature.

. HERBERT S. BLYNT. 

